aboutsummaryrefslogtreecommitdiff
path: root/arch
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2019-08-14 10:31:11 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-08-14 10:31:11 -0700
commite83b009c5c366b678c7986fa6c1d38fed06c954c (patch)
treea7cc0449b32c7086ba44441dfac547a3940528be /arch
parentb5e33e44d994bb03c75f1901d47b1cf971f752a0 (diff)
parent33dcb37cef741294b481f4d889a465b8091f11bf (diff)
download96b-common-e83b009c5c366b678c7986fa6c1d38fed06c954c.tar.gz
Merge tag 'dma-mapping-5.3-4' of git://git.infradead.org/users/hch/dma-mapping
Pull dma-mapping fixes from Christoph Hellwig: - fix the handling of the bus_dma_mask in dma_get_required_mask, which caused a regression in this merge window (Lucas Stach) - fix a regression in the handling of DMA_ATTR_NO_KERNEL_MAPPING (me) - fix dma_mmap_coherent to not cause page attribute mismatches on coherent architectures like x86 (me) * tag 'dma-mapping-5.3-4' of git://git.infradead.org/users/hch/dma-mapping: dma-mapping: fix page attributes for dma_mmap_* dma-direct: don't truncate dma_required_mask to bus addressing capabilities dma-direct: fix DMA_ATTR_NO_KERNEL_MAPPING
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mm/dma-mapping.c4
-rw-r--r--arch/arm64/mm/dma-mapping.c4
-rw-r--r--arch/powerpc/Kconfig1
-rw-r--r--arch/powerpc/kernel/Makefile3
-rw-r--r--arch/powerpc/kernel/dma-common.c17
5 files changed, 3 insertions, 26 deletions
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 6774b03aa405..d42557ee69c2 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -2405,9 +2405,7 @@ long arch_dma_coherent_to_pfn(struct device *dev, void *cpu_addr,
pgprot_t arch_dma_mmap_pgprot(struct device *dev, pgprot_t prot,
unsigned long attrs)
{
- if (!dev_is_dma_coherent(dev))
- return __get_dma_pgprot(attrs, prot);
- return prot;
+ return __get_dma_pgprot(attrs, prot);
}
void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c
index 1d3f0b5a9940..bd2b039f43a6 100644
--- a/arch/arm64/mm/dma-mapping.c
+++ b/arch/arm64/mm/dma-mapping.c
@@ -14,9 +14,7 @@
pgprot_t arch_dma_mmap_pgprot(struct device *dev, pgprot_t prot,
unsigned long attrs)
{
- if (!dev_is_dma_coherent(dev) || (attrs & DMA_ATTR_WRITE_COMBINE))
- return pgprot_writecombine(prot);
- return prot;
+ return pgprot_writecombine(prot);
}
void arch_sync_dma_for_device(struct device *dev, phys_addr_t paddr,
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 77f6ebf97113..d8dcd8820369 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -121,7 +121,6 @@ config PPC
select ARCH_32BIT_OFF_T if PPC32
select ARCH_HAS_DEBUG_VIRTUAL
select ARCH_HAS_DEVMEM_IS_ALLOWED
- select ARCH_HAS_DMA_MMAP_PGPROT
select ARCH_HAS_ELF_RANDOMIZE
select ARCH_HAS_FORTIFY_SOURCE
select ARCH_HAS_GCOV_PROFILE_ALL
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index ea0c69236789..56dfa7a2a6f2 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -49,8 +49,7 @@ obj-y := cputable.o ptrace.o syscalls.o \
signal.o sysfs.o cacheinfo.o time.o \
prom.o traps.o setup-common.o \
udbg.o misc.o io.o misc_$(BITS).o \
- of_platform.o prom_parse.o \
- dma-common.o
+ of_platform.o prom_parse.o
obj-$(CONFIG_PPC64) += setup_64.o sys_ppc32.o \
signal_64.o ptrace32.o \
paca.o nvram_64.o firmware.o
diff --git a/arch/powerpc/kernel/dma-common.c b/arch/powerpc/kernel/dma-common.c
deleted file mode 100644
index dc7ef6b17b69..000000000000
--- a/arch/powerpc/kernel/dma-common.c
+++ /dev/null
@@ -1,17 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Contains common dma routines for all powerpc platforms.
- *
- * Copyright (C) 2019 Shawn Anastasio.
- */
-
-#include <linux/mm.h>
-#include <linux/dma-noncoherent.h>
-
-pgprot_t arch_dma_mmap_pgprot(struct device *dev, pgprot_t prot,
- unsigned long attrs)
-{
- if (!dev_is_dma_coherent(dev))
- return pgprot_noncached(prot);
- return prot;
-}